How to Name Your Missouri LLC

Filing fee: $50 online / $105 by mail or fax

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State agency: Missouri Secretary of State

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To name your LLC in Missouri, your name must include an approved LLC designator, be distinguishable from every other business name on file with the Missouri Secretary of State, and avoid restricted words. Missouri doesn't layer on many extra requirements beyond those general rules, which makes the naming process more straightforward than in some other states.

Required LLC designator

Every Missouri LLC name must end with a word or abbreviation that signals it's a limited liability company. Missouri accepts all of the following designators.

• Limited Liability Company
• Limited Company
• LLC
• L.L.C.
• LC
• L.C.

Distinguishability requirement

Your proposed name must be distinguishable from every existing or reserved business name in the Missouri Secretary of State's database — not just other LLCs, but all entity types. Missouri doesn't rely on exact matches alone. A name can be rejected if it's too similar in wording or sound to an existing name, even if the spelling differs.

That phonetic similarity rule catches people off guard. "Acme Solutions LLC" and "Akme Solutions LLC" could both be flagged as conflicting names.

Check Missouri LLC name availability using the Missouri Secretary of State's Business Entity Search portal. Enter your desired name — or a key word from it — and review the results for existing or reserved entities with the same or similar names. If your exact name appears, it's not available.

Search by individual keywords, not just the full name. Searching only the first word — or even the first 3 letters — surfaces similar names that a full-phrase search might miss. You can also adjust the match setting to "any words" or "starting with" to broaden the results.

The search tool also lets you look up by registered agent, charter number, and name availability status, so you have a few ways to cross-check before committing to a name.

Missouri lets you reserve an available LLC name for 60 days while you prepare your Articles of Organization. You can renew the reservation twice, each time for another 60 days — giving you a maximum of 180 days of continuous protection for the same name.

Once you've hit the 180-day limit, the same applicant can't extend the reservation further. Time your filing so your Articles of Organization go in before that window closes.

If you want to run your Missouri LLC under a name that's different from its registered legal name, you need to file a fictitious name — also called a DBA or trade name. Missouri requires this registration under Section 417.200 of the Revised Statutes of Missouri.

File Missouri Secretary of State form Corp. 56, "Registration of Fictitious Name," and pay the $7 filing fee. Once registered, your LLC can legally operate and advertise under that fictitious name in Missouri.

Clearing a name through the Missouri Secretary of State's database only confirms it's available at the state level. It doesn't tell you whether the name infringes on a federally registered trademark. Before you finalize your LLC name, run a search in the USPTO's Trademark Electronic Search System (TESS) at uspto.gov.

State registration and federal trademark protection are separate systems. A name can be available in Missouri and still be protected by a federal trademark held by a business in another state. If there's any overlap, talk to a legal professional before filing.

To change your Missouri LLC's legal name after formation, file an Amendment of Articles of Organization with the Missouri Secretary of State. The state filing fee is $25, and it's the same whether you file online, by mail, or in person.

Before filing the amendment, check that your new name is available using the Secretary of State's business entity search. The new name must meet all Missouri naming rules — including the distinguishability requirement — just like a name chosen at formation.